Look into utilizing React Hooks + Functional Components

[danielhan-uc]

Goal of enhancement

As react version is > 16.8, you should be able to take advantage of...
A. Functional Components
Functional Components make your code easier to read and understand. With fewer lines, the size of your project will also decrease.
Refer to Link by React
Refer to Blog on Functional Components

B. Utilize React Hooks
React Hooks is a new way of managing state without writing class and setState. It helps organize file by separating state management and render.
Refer to Link by React
Refer to Medium Blog about Hooks

Areas like https://github.com/TeamFirstCapstone/Pet-Meeting-Client/blob/master/src/pages/Signup.jsx#L11-L17 can be optimized with hooks.

Optimizing code with Functional Components and React Hooks will also make writing tests much easier.